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[libvirt-users] Q on stupid video tricks
by Whit Blauvelt 02 Aug '11

02 Aug '11

Hi, The good news is that if you use Virt-Manager running in a VM viewed through Virt-Manager, that VM can drill another level through to view VMs. The badish news is if that's a GUI desktop, the video for the VM-in-VM view ends up (at least for me) with some serious artifacts - particularly distortions largely involving vertical lines down through it. Okay, this is an odd case that hardly counts as a problem, since who would be crazy enough to do it? Still, since that's me, I'm wondering if there's any setting to tweak that would bring that video into better focus? Thanks, Whit

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[libvirt-users] Migration hangs on Gentoo with KVM
by Jonathan Stoppani 02 Aug '11

02 Aug '11

Hi there, I'm trying to migrate a domain between two Gentoo hosts using KVM as hypervisor, but the migration hangs. I tried both live or offline migration modes without success. Details below. Anyone has an idea of what could be wrong with my setup? The migration is the only thing not working. Host A (initially running the VM) ================================= # uname -a Linux pion 2.6.39-gentoo-r3 #12 SMP Fri Jul 29 23:57:49 MST 2011 x86_64 AMD Opteron(tm) Processor 6174 AuthenticAMD GNU/Linux # kvm --version QEMU emulator version 0.14.1 (qemu-kvm-0.14.1), Copyright (c) 2003-2008 Fabrice Bellard # libvirtd --version libvirtd (libvirt) 0.9.3 # cat /etc/libvirt/libvirtd.conf http://dpaste.com/hold/583874/ # cat /etc/libvirt/qemu.conf http://dpaste.com/hold/583873/ # /etc/init.d/libvirtd start # cat /var/log/libvirt/libvirtd.log http://pastebin.com/V615fgbK # virsh create descriptions/domain.xml # cat descriptions/domain.xml http://dpaste.com/583880/ # cat /var/log/libvirt/libvirtd.log http://pastebin.com/0PSDAZhN (startup log removed) # cat /var/log/libvirt/qemu/nd-50f05b3-0.log http://dpaste.com/583877/ # virsh migrate nd-50f05b3-0 qemu+ssh://host-b/system Password: --> Never exits # cat /var/log/libvirt/libvirtd.log http://pastebin.com/EqHBHx8R (startup and domain creation log removed) # virsh list Id Name State ---------------------------------- 1 nd-50f05b3-0 paused Host B (destination host) ========================= # uname -a Linux lenny 2.6.39-gentoo-r3 #6 SMP Fri Jul 29 18:58:08 MST 2011 x86_64 Intel(R) Xeon(R) CPU 3040 @ 1.86GHz GenuineIntel GNU/Linux # kvm --version QEMU emulator version 0.14.1 (qemu-kvm-0.14.1), Copyright (c) 2003-2008 Fabrice Bellard # libvirtd --version libvirtd (libvirt) 0.9.3 # cat /etc/libvirt/libvirtd.conf http://dpaste.com/hold/583874/ (same as host A) # cat /etc/libvirt/ http://dpaste.com/hold/583873/ (same as host A) # /etc/init.d/libvirtd start # cat /var/log/libvirt/libvirtd.log http://pastebin.com/WnyqubU6 --> Start migration # cat /var/log/libvirt/libvirtd.log http://pastebin.com/E45JtvGd (startup log removed) # virsh list Id Name State ---------------------------------- 1 nd-50f05b3-0 paused Additional notes ================ * The process seams to deadlock somewhere, CPU usage is near to 0% * The disk images are available on both hosts at the same location (I'm using a COW2 image based on another COW2 image, both are available) * The shared FS is mounted through fuse-sshfs * I just noticed that my clocks are skewed. I will rerun the whole test with a correctly setup ntp server, but I had the same problem last week with perfectly synchronized clocks, so I doubt this will make a difference. Thanks very much, Jonathan

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[libvirt-users] Is there a good way to "slot" libvirtd versions?
by Whit Blauvelt 01 Aug '11

01 Aug '11

Hi, Is there a reasonable way to alternately use several versions of libvirtd on the same system? I ask because there are features of 0.9.X I want to experiment with, yet also need to use the systems where I'm doing that to connect via virt-manager and virsh to non-experimental systems running 0.8.8 and 0.8.3 on Ubuntu - which the compiled-from-tar 0.9.x has an incompatibility with. As far as I can see with library dependencies there's no simple way to run different editions of the libvirtd stack alternately on the same system. But I could easily be missing a trick. Anyone have this working? Thanks, Whit

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[libvirt-users] centos6.0 unable to install guests w/ kickstart via virt-install
by Charles 01 Aug '11

01 Aug '11

How does one use virt-install and kickstart ? I've seen others have success but I've had no joy thus far. BTW, my interactive virt-installs for centos6 guests work just fine AND I can do unattended kickstarts for vms by booting from centos6 install dvd and typing the kickstart commands from the boot: prompt. However, kickstart commands in --extra-args when used w/ virt-install just don't seem to work for me. It looks like the kickstart file is just getting ignored .. virt-install -n d2 \ -r 1024 \ --vcpus=2 \ -l http://mirror.cogentco.com/pub/linux/centos/6/os/x86_64/ \ --accelerate -v \ --disk path=/data/vm/d2.img,size=10 \ --os-type=linux \ --os-variant=rhel6 --network=bridge:br0 -x "ks=http://10.1.10.2/id400ks.cfg ip=10.1.10.2 netmask=255.255.255.0 gateway=10.1.10.1 dns=8.8.8.8" The above will boot from the mirror and then launch into the interactive graphical installer as though the kickstart file isn't even there. kickstart file is here http://pastebin.com/ZChtv2C5 I also tried 'virsh edit domain' and set cmdline to <cmdline>ks=http://10.1.10.2/id400ks.cfg</cmdline> and that didn't work. vm would'nt start. details ... uname -a Linux myhost 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011 x86_64 x86_64 x86_64 GNU/Linux [root vm]# rpm -qa | grep libvir libvirt-0.8.1-27.el6_0.6.x86_64 libvirt-client-0.8.1-27.el6_0.6.x86_64 libvirt-python-0.8.1-27.el6_0.6.x86_64 [root vm]# rpm -qa | grep kvm qemu-kvm-tools-0.12.1.2-2.113.el6_0.8.x86_64 qemu-kvm-0.12.1.2-2.113.el6_0.8.x86_64 any hlp apprec. C.

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[libvirt-users] UID/GID for qemu & kvm
by Jeff 29 Jul '11

29 Jul '11

We use AD infrastructure for user/group management, and GID 107 is already in use. Can I create an AD entry for the kvm and qemu groups with different GIDs, as well as the qemu user/UID? From looking at the libvirt package, it appears it does a getent to see if these exist and, if not, creates them locally, so I assume adding them to AD is ok - and that the GID/UID specified in the package isn't explicitly necessary. Just looking for verification. - Jeff

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[libvirt-users] ANNOUNCE: ruby-libvirt 0.4.0
by Chris Lalancette 29 Jul '11

29 Jul '11

All, I'm pleased to announce the release of ruby-libvirt 0.4.0. ruby-libvirt is a ruby wrapper around the libvirt API. Version 0.4.0 brings new APIs, more documentation, and bugfixes: * Updated Domain class, implementing dom.memory_parameters=, dom.memory_parameters, dom.updated?, dom.migrate2, dom.migrate_to_uri2, dom.migrate_set_max_speed, dom.qemu_monitor_command, dom.blkio_parameters, dom.blkio_parameters=, dom.state, dom.open_console, dom.screenshot, and dom.inject_nmi * Implementation of the Stream class, which covers the libvirt virStream APIs * Add the ability to build against non-system libvirt libraries * Updated Error object, which now includes the libvirt code, component and level of the error, as well as all of the error constants from libvirt.h * Updated Connect class, implementing conn.sys_info, conn.stream, conn.interface_change_begin, conn.interface_change_commit, and conn.interface_change_rollback * Updated StorageVol class, implementing vol.download and vol.upload * Various bugfixes Version 0.4.0 is available from http://libvirt.org/ruby: Tarball: http://libvirt.org/ruby/download/ruby-libvirt-0.4.0.tgz Gem: http://libvirt.org/ruby/download/ruby-libvirt-0.4.0.gem It is also available from rubygems.org; to get the latest version, run: $ gem install ruby-libvirt As usual, if you run into questions, problems, or bugs, please feel free to mail me (clalance(a)redhat.com) and/or the libvirt mailing list. -- Chris Lalancette

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[libvirt-users] management tools for kvm
by David M. Barlieb 29 Jul '11

29 Jul '11

I have been installing kvm guests on a number of hosts and have been managing them through a single virt manager on one of the hosts. I am looking for a tool that will allow me to manage them from a windows workstation, possibly using a web interface. Everything I've looked at and read about seems to require a linux workstation to install on, like oVirt or ConVirt. I am looking for a product that can run on a windows workstation using either firefox or ie. dave

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[libvirt-users] Seg fault in 0.9.4-rc1
by Whit Blauvelt 28 Jul '11

28 Jul '11

Hi, Using virt-manager, asking to migrate a kvm domain from the same box virt-manager is running on to another consistently results in libvirtd faulting on the local box. Migration in the other direction, from the second box to the box virt-manager is on, works fine. A libvirtd log made with debug=1 is at http://transpect.com/debug/libvirtd_segfault.log It was doing the same thing with a recent 0.9.3 git version too. This is with virt-manager 0.9.0. Whit

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[libvirt-users] qemu:///session vs qemu:///system
by Peter Thomassen 28 Jul '11

28 Jul '11

Hi, I am running several QEMU VMs on a host machine. There's different persons being responsible for different VMs. I would like to find a way to allow everybody to manage just the VMs they are assigned to (i.e. insert some ISO file, stop the machine and so on) without allowing them to disturb the other VMs. Also, I would like to allow these persons to set up new VMs (there's plenty of unallocated storage) without having to ask me (root) to do it for them, but without allowing them to delete other VMs. (Just setting user rights on the filesystem is not enough, as I use LVM volumes which are not assigned to a user in the typical sense, are they?) I know that most of this could probably be achieved by using qemu:///session instead of qemu:///system. However, I read that there's networking issue in this case (which issues precisely?), and I am also not sure if there's other disadvantages like less efficient handling in some situations by the kernel, or whatever. Is anybody there who could clarify this for me? Thank you, Peter

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[libvirt-users] small webGUI?
by Stefan G. Weichinger 28 Jul '11

28 Jul '11

Greetings, at a customer we run a single VM for a specific application. Unfortunately this VM does not start automatically with the host although I checked the relevant box within virtual machine manager. I assume upgrading libvirt might help (we run 0.8.7-r1 right now, gentoo linux). Aside from that it would be good to have a simple WebGUI for the users to let them press START just in case. They run Windows on their machines so I can't give them VMM ... Could you point me at the most simple GUI to do that? I'd prefer something very lightweight without too much requirements (for example I'd like to avoid installing mysql for that ;-) ). Thank you, Stefan

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